fenian Meaning, Definition & Usage

Fe"ni*an noun
Etymology
From the Finians or Fenii, the old militia of Ireland, who were so called from Fin or Finn, Fionn, or Fingal, a popular hero of Irish traditional history.
Definitions
  1. A member of a secret organization, consisting mainly of Irishment, having for its aim the overthrow of English rule in ireland.

Webster 1913